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6. Then flew one of the seraphim to me. The Prophet shows what kind of relief was brought to him, when he was so terrified as to think that he was a dead man; and this confirms what we have already said, that purity of lips comes from God alone; for men can produce nothing of themselves but what is filthy and abominable. If it be objected that it is absurd to say that the Lord now cleansed him, as if his tongue had formerly been impure and profane, though it had been the instrument employed by the Holy Spirit, I have already replied sufficiently to that objection. The Lord had already cleansed him, but according to his degree. The cleansing which is now added is greater; for it has its enlargements and additions, which no man can obtain all at once.

We must not conclude, therefore, that Isaiah’s lips were impure, because they are now cleansed; but we ought to inquire why it is done. It was because the Lord intended to enlarge and extend his favor towards him, and to raise him to higher dignity, that he might have greater influence over the people; and this was rendered necessary by the character of the times, and the change which had taken place in the state.

The fire was taken from the altar, to intimate that it was divine or heavenly; for the law forbade any strange fire to be brought to it, (Leviticus 10:1,) because in sacred things every human mixture is absolute profanation. By this figure, therefore, Isaiah was taught that all purity flows from God alone.

7. And applying it to my mouth. ⁹⁴⁹⁴     And he laid it upon (marg., caused it to touch) my mouth. — Eng. Ver. We see how God condescends to meet the weakness of human sense. He puts the tongs into the hand of a seraph, that by means of it he may take a coal from the altar and apply it to the Prophet’s mouth. This was, no doubt, done in vision; but by the aid of the outward sign God assisted the Prophet’s understanding. There is no reason to believe that the coal possessed any virtue, as superstitious persons imagine that in the magical arts there is some hidden power. Nothing of this sort is to be found here; for it is God alone who can cleanse our pollution, in whatever part it exists.

Here the angel administered the cleansing, but was not the author of it; so that we must not ascribe to another what belongs to God alone. This is expressly stated by the angel himself, who claims nothing as his own, but bringing forward the sacred pledge which he had received from God, laid it as a sacrament on the lips of the Prophet; not that he could not be cleansed without the coal, but because the visible sign was useful for the confirmation and proof of the fact. And such is the use of sacraments, to strengthen us in proportion to our ignorance; for we are not angels, that can behold the mysteries of God without any assistance, and therefore he raises us to himself by gradual advances.

Lo, this hath touched thy lips. He shows that the confirmation which was obtained by the sign was not without effect, but that the blessing signified by it was at the same time bestowed, so that Isaiah knew that he had not been deceived. Hence we may infer, that in the sacraments the reality is given to us along with the sign; for when the Lord holds out a sacrament, he does not feed our eyes with an empty and unmeaning figure, but joins the truth with it, so as to testify that by means of them he acts upon us efficaciously. And this ought to be the more carefully observed, because there are few persons in the present day who understand the true use of sacraments, and because many godly and learned men are engaged in frequent disputes respecting them.

First of all, we ought to believe that the truth must never be separated from the signs, though it ought to be distinguished from them. We perceive and feel a sign, such as the bread which is put into our hands by the minister in the Lord’s Supper; and because we ought to seek Christ in heaven, our thoughts ought to be carried thither. By the hand of the minister he presents to us his body, that it may be actually enjoyed by the godly, who rise by faith to fellowship with him. He bestows it, therefore, on the godly, who raise their thoughts to him by faith; for he cannot deceive.

Unbelievers indeed receive the sign; but because they linger in the world, and do not arrive at Christ’s heavenly kingdom, they have no experience of the truth; for he who has not faith cannot raise his thoughts to God, and therefore cannot partake of Christ. Faith alone opens for us the gate of the kingdom of God; and therefore, whoever wishes to eat the flesh of Christ must be carried by faith to heaven beyond human conception. In short, it is the Spirit of God alone who can make us partakers of that fellowship. And yet it does not follow that the unbelief of men takes anything away from the truth of the sacrament, since God always presents to us a spiritual matter, but wicked men treat it with scorn; just as the grace of God is offered by the gospel, but all do not receive it, though they actually hear it, and are compelled to yield assent to the truth.

Besides, we learn from this passage that the sacraments are never separated from the word. The angel does not here act the part of a dumb man, but, after having given the sign, immediately adds the doctrine, in order to show what was intended by it; for it would have been no sacrament, if doctrine had not been added, from which Isaiah could learn for what purpose the coal was applied to his mouth. Let us therefore learn that the chief part of the sacraments consists in the word, and that without it they are absolute corruptions, such as we see every day in popery, in which the sacraments are turned into stage-plays. The amount of the whole is, that there is nothing to prevent Isaiah, who has been perfectly cleansed, and is free from all pollution, from appearing as God’s representative.

8. Afterwards I heard the voice of the Lord. The Prophet now begins to discourse about the design of this vision, why God appeared to him with such glorious majesty, in order to ordain him anew as a prophet. It was because he was called to deliver an incredible message about blinding the Jews. On this revolting occasion, therefore, he is more fully assured of his calling, that he may lay aside fear and obey the command of God; for nothing gives greater confidence to pious minds than to know that they obey God. He had also another proof, namely, that the Lord had cleansed him; and this was sufficient to lead him to undertake any task, however difficult.

Whom shall I send? The Prophet represents the Lord as speaking, as if he could not find a man qualified for such a message. Some think that this is intended to reprove the ignorance of the priests and prophets; because, though they are very numerous, still not one of them was qualified to teach. This reason carries some probability, but I would rather view it as referring to the certainty of Isaiah’s calling, as implying that it was not at random, but from choice, that the Lord appointed him. There is here, therefore, a weighty deliberation whom the Lord will be pleased to send; not that he hesitates, but such modes of expression are used on our account, just as these words, I will go down and see. (Genesis 18:21.) For God, to whom all things are known, has no need to make any inquiry; but, lest men should think that he acts with precipitation, he thus accommodates himself to the ordinary modes of speaking among men. In like manner, when he asks whom he shall send, the meaning is, that he needs not an ordinary person, but a teacher of uncommon excellence on a subject of the greatest importance. Hence we infer that the authority of Isaiah was confirmed, so that he was reckoned to be not only a prophet, but eminent among the prophets.

Who will go for us? I am rather favorable to the opinion that this passage points to Three Persons in the Godhead, just as we elsewhere read,

Let us create man in our likeness. (Genesis 1:26.)

For God talks with himself, and in the plural number; and unquestionably he now holds a consultation with his eternal Wisdom and his eternal Power, that is, with the Son and the Holy Spirit.

Here am I. So ready a reply shows how great is that cheerfulness which springs from faith; for he who but lately lay like a dead man dreads no difficulty. Hence we see that the amazement of which we have formerly spoken did not spring from rebellion, in wishing to flee from God, or to refuse the charge which had been laid upon him; but because he needed new grace, that he might know that he would be able to endure the burden. On this account it ought to be observed, that we cannot undertake anything in a proper manner without the evidence of our calling; otherwise we shall pause and hesitate at every step.

Besides, it is a powerful aid to our confidence, when we know that we are not destitute of the necessary gifts, but that God has bestowed them on us, in order that we may be better enabled to discharge our office. Now, this remarkable instance of obedience ought to produce such an effect on our minds that we shall readily and cheerfully undertake any task which he may be pleased to enjoin, and shall never refuse any task, however difficult we may imagine it to be. When the Prophet says, Here am I, the meaning is, that he is ready to obey the commands of God; for this mode of expression is frequently employed in Scripture to denote obedience.